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The world’s largest bacterium found in Caribbean mangrove swamps

This photomicrograph, provided by Lawrence Berkeley National Laboratory in June 2022, shows a thin strand of thiomargarita magnificent bacterial cells next to a US dime. This species was found in the mangroves of the Guadeloupe Islands in the Caribbean, France. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credit: Tomas Tyml / Lawrence Berkeley National Laboratory via AP

Scientists have discovered the world’s largest bacterium in the Caribbean mangrove swamps.

many Bacteria It ’s microscopic, but it ’s so big that it ’s so big. Naked eye..

Jean-Marie Voland says that the thin white filament, which is about the same size as human eyelashes, is “by far the largest bacterium known to date.” Marine biologist Co-author of a paper published in the journal on Thursday at Lawrence Berkeley National Laboratory Chemistry..

Olivier Gross, co-author and biologist at the University of the West Indies and Giana, has discovered the first example of this bacterium clinging to the sunken mangrove leaves of the Guadeloupe Islands. 2009.

But he didn’t immediately know that it was a bacterium because of its surprisingly large size. These bacteria average one-third inches (0.9 centimeters) long.Only later Genetic analysis It was revealed that the organism is a single bacterial cell.

“This is a surprising discovery,” said Petra Levin, a microbiologist at Washington University in St. Louis who was not involved in the study. “It raises the question of how many of these giant bacteria are, and reminds us that bacteria should never be underestimated.”

  • The world's largest bacterium found in Caribbean mangrove swamps

    This photomicrograph, provided by Lawrence Berkeley National Laboratory in June 2022, shows some of the thiomargarita magnifica bacterial cells. This species was found in the mangroves of the Guadeloupe Islands in the Caribbean, France. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credits: Olivier Gros / Université des Antilles via AP

  • The world's largest bacterium found in Caribbean mangrove swamps

    This photomicrograph, provided by Lawrence Berkeley National Laboratory in June 2022, shows some of the thiomargarita magnifica bacterial cells. This species was found in the mangroves of the Guadeloupe Islands in the Caribbean, France. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credits: Olivier Gros / Université des Antilles via AP

  • The world's largest bacterium found in Caribbean mangrove swamps

    This photo, provided by Lawrence Berkeley National Laboratory in June 2022, shows a mangrove in which the Thiomargarita Magnifica bacterium was found in the Guadeloupe Islands of the Caribbean, France. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credits: Pierre Yves Pascal / Université des Antilles via AP

  • The world's largest bacterium found in Caribbean mangrove swamps

    This photomicrograph, provided by Lawrence Berkeley National Laboratory in June 2022, shows filaments of thiomargarita magnificabacteria cells. This species was found in the mangroves of the Guadeloupe Islands in the Caribbean, France. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credits: Jean-Marie Volland / Lawrence Berkeley National Laboratory via AP

  • The world's largest bacterium found in Caribbean mangrove swamps

    This photomicrograph, provided by Lawrence Berkeley National Laboratory in June 2022, shows filaments of thiomargarita magnificabacteria cells. This species was found in the mangroves of the Guadeloupe Islands in the Caribbean, France. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credits: Jean-Marie Volland / Lawrence Berkeley National Laboratory via AP

  • The world's largest bacterium found in Caribbean mangrove swamps

    This photo, provided by Lawrence Berkeley National Laboratory in June 2022, shows the mangrove of the Guadeloupe Islands in the Caribbean, France, where the Thiomargarita Magnifica bacterium was discovered. Researchers at the Department of Energy (DOE) Joint Genome Institute (JGI), Lawrence Berkeley National Laboratory (Berkeley Institute), Complex Systems Laboratory (LRC), and Antilles University have characterized the bacterium. A single cell that is 5,000 times larger than other bacteria. Credits: Hugo Bret / Lawrence Berkeley National Laboratory via AP

Gross also discovered that bacteria were attached Oyster shellSwamp rocks and glass bottles.

Scientists have not yet been able to grow it in laboratory cultures, but researchers say the cells have a structure that is unusual for bacteria. One important difference: it has a large central compartment, or vacuole, which allows some cellular function to occur within it. Controlled environment Not the entire cell.

“The acquisition of this large central vacuole will definitely help the cells avoid physical restrictions … about cell size,” said a biologist at the French National Center for Scientific Research, who was not involved in the study. , Manuel Campos said.

Researchers said they didn’t know why the bacteria were so big, but co-author Volant hypothesized that they might be an adaptation to prevent them from being eaten by small organisms.


Giant bacteria found in Guadeloupe mangroves challenge traditional concepts


For more information:
Jean-Marie Volland et al, a 1-centimeter-long bacterium containing DNA contained in metabolically active membrane-bound organelles, Chemistry (2022). DOI: 10.1126 / science.abb3634

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Quote: The world’s largest bacterium found in the Caribbean Mangrove Wetland (June 26, 2022) is from https://phys.org/news/2022-06-world-biggest-bacterium-caribbean-mangrove.html 2022 Obtained on June 26, 2014

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